Pressure can for hot dispensing



Nov, 16, 1965 R. KASPARIAN PRES SURE CAN FOR HOT DISPENSING Filed Nov.13, 1963 m w W m V m 3 R F M I V. B

United States Patent 3,217,937 PRESSURE CAN FOR HOT DISPENSING Kaspar R.Kasparian, 1309 Harshaw Road, Toby Farms, Chester, Pa. Filed Nov. 13,1963, Ser. No. 323,301 1 Claim. (Cl. 222-446) This invention relates toa pressurized dispensing can. It has particular applicability to therelatively small metal containers suitable for home use in dispensing awide variety of products.

One type of such pressure can to which the invention is applicable isthe Aerosol type, although other forms of gas pressure loading areequally suitable.

The invention has particular applicability in such cans as are used todispense products which are preferably warm when dispensed. Suchproducts include shaving creams and certain food products. It is clearthat the lack heretofore of efiicient means for providing heated productdispensing has probably inhibited the appearance or wide-spread presenceof products on the market whose natures indicate that they could best bedispensed in a heated fashion.

. The application to shaving cream dispensers is quite obvious. It hasbeen known to attempt to dispense heated shaving creams throughrelatively large stationary units in which a supply of shaving cream issupplied. Such units are commonly seen in barber shops. There have beenattempts made to heat the shaving cream as dispensed from pressure cans.One such expedient mounts the can in a stationary structure. Anothersuch expedient provides an attachment to the dispensing spout of thepressure can. Another such expedient provides for passing the shavingcream through a finely divided metal volume which is intended to providebetter heat conductivity. The present invention is intended to be animprovement over these other expedients and to provide a moresatisfactory and universal solution to the heating problem.

It is apparent that merely holding a pressurized can under running hotwater, or leaving it in hot water, is an inefficient expedient.

It is an object of this invention to provide a pressurized can.

It is an object of this invention to provide a pressurized cancomprising two compartments, one of said compartments containing theproduct to be dispensed and a propelling agent, and the other of saidcompartments containing heat exchange means.

It is yet another object of this invention to provide a pressure candispenser in which the product and its propelling agent in onecompartment are led through a tube into a second compartment sealed fromsaid first compartment, said second compartment containing a pluralityof convolutions of said tube, and comprising a hot water tank, said tubethence going to a discharge valve.

Other aims and objects of this invention are made apparent in thefollowing specification and claims.

The invention is best understood in connection with the accompanyingdrawing in which like reference numerals refer to like parts and inwhich:

FIGURE 1 is a top view of the pressure can;

FIGURE 2 is a front elevation view thereof; and

FIGURE 3 is a cross-sectional longitudinal view taken through the centerof the caps.

The invention is best described as to its structure in connection withFIGURE 3. A can or container 6, preferably of the usual metalconstruction is provided. This can has a first or main compartment 9 inwhich the product to be dispensed, together with the liquid or gaseouspropellant is provided, all within the scope of well known art. Thispropellant-product combination may be of 3,217,937 Patented Nov. 16,1965 the aerosol type or may not be. All the various ways in whichpropellant and product can be utilized in a single container are withinthe scope of this invention, and no novelty is claimed with respect tothe product or propellant.

A second or hot water compartment 8 is provided as an integral part ofcontainer 6, but above the main, first or product compartment 9. The twocompartments are preferably kept thermally isolated from each other byinsulation 5. In the embodiment shown, the insulation 5 consists merelyof an air space, although it is within the scope of the invention toprovide a. solid insulating material, such as asbestos if desired.

A tube 4 leads from the main compartment 9 to the dispenser cap 1. Thistube is preferably of extruded or otherwise molded plastic, although itmay be of metal construction. In so far as the relationship between thetube extending into and toward the bottom of the product compartment 9and its connection to the dispenser cap is concerned, the functionalrelationship is in accord with the normal practice and teaching of thewell known art. The dispenser cap 1 contains within it a valve 3. Inaccord with normal practice, when the dispenser cap 1 is depressed, thevalve 3 is opened, and product, or mixed product and propellant travelsthrough tube 4 and the cap 1, and thence out the dispensing spout.

A departure from known practice comes in that instead of tube 4 runningdirectly from the product compartment to the valve, it is extended inlength, and this extended length is positioned within the second or hotwater compartment 8. As shown, a preferable arrangement of the extendedportion of tube 4 is that of a coil of large diameter in comparison tothe size of the compartment. Quite preferably, a plurality of thesecoils are provided. As illustrated, there are only two complete turns inthe coil, for simplicity of illustration, and the structure is workable.For better heat exchange purposes, more coils would be provided. Theexact nature of the disposition of the tube 4 within the hot watercompartment 8 is not critical. In principle, it is only required thatthe tube pass through this compartment; in practice, the more coillength disposed within the compartment, the better the heat exchange,and the hotter the dispensed product. The coil 4 may be convoluted inthe hot water compartment in a manner other than a neat coil; it maysimply be stuffed in, for example.

An opening into the hot water compartment 8 is provided, normallycovered by a hot water" cap 2. In use, the cap 2 is removed, hot waterfrom any available source is run into the compartment 8 and the cap 2 isreplaced.

The hot water immediately begins the transfer of its heat to the productlying within that portion of the tube contained in the upper or hotwater compartment. The container 6 need not be held under running watereither continuously or for any particular period of time, nor need it beimmersed. There is no necessity of attempting to heat the entire productcontent of the container 6 or to heat the propellant. There is anelimination of whatever minor danger there may be of putting too muchstress on the container by overheating it since the application of heatis confined 0t only a small portion of the product, that is, that lyingwithin the convoluted section of tube 4. There is no mixing of the water(or other heating liquid) with the product to be dispensed, since, asillustrated, the interior of the second or hot water compartment issealed or isolated from the interior of the main compartment. Thus,there is no prob. lem of possible contamination of the product. This isparticularly important regarding food products. Furthermore, there is nopossibility of rusting or other corrosion on the part of metal heatexchange aids in contac with the product. The device permits moderatelyaccurate control of the heat of the product to be dispensed, since alittle experience in use indicates the temperature of the water whichshould be loaded into compartment 8. Furthermorme, in the design of thedevice for various uses, such as foods or shaving creams, the amount ofexposed heat exchange surface within compartment 8 may be chosen as amatter of simple design to meet the particular requirements. Anotheradvantage of this present device over previously known attempts is thatresistance to the passage of the product through the tube and out thedispensing spout is increased only by a relatively small amount due tothe increased length of the tube and the turns therein. The structurepermits this additional length and the additional turns to be kept tothe minimum required for the heat exchange, and there are no additionaloutside connections or restrictive passages.

It is noted that once the hot water compartment has been filled, theuser is independent of the source of hot water, and the user may carrythe can with him to some other place of use.

In its broadest sense, the second compartment 8 is adapted to receiveany liquid having a temperature differing from the ambient temperature,that is, differing from the normal temperature of the product containedin the can 6. Examples of products which can be usefully dispensedheated with the teachings of this invention include shaving cream,shampoo, hair dyes, hair cream rinses, and food toppings such as fudgesand syrups.

The scope of this invention is to be determined by the appended claimand is not to be limited to the foregoing description and drawing, whichare intended to be illustrative.

I claim:

A disposable pressurized dispensing can adapted to dispense warmproduct, integrally comprising (a) a main compartment adapted to containproduct to be dispensed and a propelling agent therefor, (b) a secondcompartment positioned above said main compartment and insulatedtherefrom by an air space and sealed therefrom, (c) a dispensing capincluding a manually operable valve and a spout on said secondcompartment, a tube extending from said main compartment through saidsecond compartment to said dispensing cap valve, said tube having anextended convoluted heat exchange section within said secondcompartment, the interior of said tube being sealed from said secondcompartment, and an opening in said second compartment whereby a liquidhaving a temperature differing from ambient may be received into saidsecond compartment.

References Cited by the Examiner UNITED STATES PATENTS 1,944,894 1/1934Kennedy 16575 X 2,028,098 1/1936 Zafuta 222-- 2,686,615 8/1954 Stocker222146 X 2,873,351 2/1959 Lannert 219214 3,043,484 7/1962 Jolly 222-4463,095,122 6/1963 Lewiecki et al. 222146 3,098,925 7/1963 Fonts et al.219214 3,175,733 3/1965 Lerner 222394 X LOUIS J. DEMBO, PrimaryExaminer.

EVERETT W. KIRBY, Examiner.

